Ingot stool



H. FELSING 'INGOT sTooL Nov.v l, 1938.

Filed July l, 1956 2- Sheets-Sheet 1 @ai y' v I i271 INVENTOR ATTORNEY Patented Nov. 1, 1938 anic UNITED- STATES PATENT OFFICE A INGOT STOOL Howard Felsing, Wheeling, W. Va.

Application July 1, 1936, Serial No. 88,324

' 5 Claims.v (ci. 22-139) This invention relates to a base for ingot molds, and more particularly to .a Abase or stool on which thevingotmold may be supported during pouring of the molten steel thereinto and during cooling of the poured metal.

As is well known in the art, molds for forming ste el ingot's preparatory to reducing the steel to sheets, plates, and the like, consist of four vertical dening walls devoid of opposite ends, the mold ordinarily being of elongated frusta-py ramidal shape. The mold during pouring of the molten steel is supported in upright position on a solid slab of metal, the slab, although of greater area than the area of the mold, forming a bottom for the latter. Slabs, or stools, as they are termed in the art, of the character referred to, quickly become useless after a comparatively short period of service for the reason that 'the an interior cast iron oor or face', the steel cas--- ing being designed to absorb shocks during rough treatment so as to render the iron oor unharmed 30 during such abuse. Castiron, preferably, gray iron, is preferably used for the ingot-contacting face because it has properties tending to `discourage the adherence thereto of the molten steel contained within the mold. l

35 Another object of the invention is to provide a stool of' the character mentioned in which a portion of the ingot contacting oor is readily renewable when worn, thereby eliminating the necessity for, scrapping the entire stool, as is 40' now the universal practice.

With these and other objects in view, the invention resides in the features of construction,

arrangement of parts, and combinations of elements which will hereinafter be fully described,

45 reference being had to the accompanying draw-` ings, in which- Figure 1 is a top plan view ofthe invention:

with the iron floor removed;

50 Figure 3 is a vertical sectional view taken o n line 3-3, Fig. 1; 'A j Figure 4 is a- `vertical sectional view taken on' line I-I, Fig. 1;

Figure 5 is an end elevational view. of the cen- 55 tral removable insert or shoe? reinforcing frame.

Figure 6 is a vertical sectional view taken on lline 6 6, Fig. 5;

Figure 7 is an end elevational View of one of the removable end inserts or shoes; and

Figure 8 is a side elevational view of the same. 5

Referring to said drawings, the reference numerals 2 and 3 designate, respectively, the side and end defining walls of a rectangular frame, preferably made of steel, the same having an integral bottom 5 and a rectangular annular seat- 10 ing ange 6 depending from said bottom.

Rectangular apertures 'l are provided in the bottom 5 at a spaced distance from the four right angle cor-ners of the frame, the defining side walls of the apertures being divergently inclined down- 15 wardly. Said apertures 'l are defined attheir upper ends by annular upstanding flanges 8 formed integral'With the bottom 5.

The central area of the bottom 5 is somewhat thicker than the remaining area thereof and this heavier central portion has formed therein laterally extending rectangularly shaped apertures 9 whose side walls are also divergently inclined downwardly. The upper surface of the heavier or thicker area of the bottom at either side and intermediate the apertures 8 is formed with a plurality of laterally extending furrows I0 curved in cross section, as shown in Figs. 2 and 3.

The steel frame, above described in detail, is designed to serve as a casing or reinforcement for an interior cast iron floor, the two elements together comprising the ingot stool. The cast iron, preferably gray iron, is cast in its molten state into the frame by any of several methods welll known in foundry practice and to those skilled -in the art.

l'Ihe iron floor II occupies a level above the plane of the sides 2 and ends 3 of the steel frame and preferably had its entire perimeter chamfered, as shown at I2. f It will also be noted that 40 the inclined sides of each of the apertures 1 and 9 tend to key the iron in place within the steel Moreover, the side and'end walls 2 and 3 of the frame are undercut at the four corners, as shown at I3, to more effectively -l-de'sired, a plurality of integral dove-tail lugs I5 Figure Zis a top plan view of the steel framemay protrude inwardly` from the steel frameto be embedded within the iron for the same purpose. v

The central area of the iron oor is appropriately cored during molding so as to form a cen- `tral recess or depression of predetermined area the opposite vertical end walls defining the cavity being convergently inclined downwardly.

The central recess in th'e iron floor is designed to removably receive therein a set of inserts or shoes consisting of end shoes I1 and an intermediate shoe I8. Each of the end shoes I1 is identical and is of trapezoidal shape in cross section, while the intermediate shoe I8 is so shaped in cross section that it serves as a wedge or key plate to effectively lock each of theshoes in intertting relation snugly within the registering recess. As shown `in Fig. 3, the` shoes, when positioned, present' a nat plane surface continuation of the face of the iron floor I Il. Tie rods extend transversely of the stool passing through the side walls 2 of the frame; the floor I8; spaced upstanding bearings 2I formed integral with the bottom 5, and through registering cored passages 22 formed in the inserts I1 and I8. Nuts 22 threadedly received by the opposite ends of each tie rod are protected Aby and housed within encircling guards 23 formed integral with the side walls 2 exteriorly thereof.

An eye bolt 24 engages the center tie rod midway between its ends and depends downwardly through the stool through an aperture 21 to receive a nut 25', the insert I8 being suitably cored, as shown at 26, to receive the eye of the bolt. Manifestly, so constructed, the removable shoes I1 and I8 cannot be disturbed without first freeing the eyebolt 24.

Bosses 28 protrude upwardly from the stool at the f our corners thereof to provide limit stops to prevent chance shifting of the ingot mold 29 from the stool while the same is being transported on a wheeled vehicle or buggy.

In practice, the ingot mold 29 is placed upon the stool in an upright vertical position so that the opening in the bottom of the mold will register with the removable cast iron shoes I1 and I I8. As the molten steel is; poured into the mold it will impinge against the iron shoes, but will not tenaciously cling thereto because "0f certain properties contained in gray iron tending to discourage the cohesion with the steel. Thus, the poured ingot and its mold may readily be removed from the stool following aA reduction in the temperature of the steel.

Following a period of use the iioor of the stool will naturally become eroded and crystallized rendering the same unfit for further service. In order to remedy the defect, all that need be done is to replace the worn shoes with new inserts which may be accomplished in a readily obvious manner. After a considerable period of use it may be found necessary to replace the entire stool, but such will not be required until several sets of inserts have been worn and replaced inasmuch as the molten steel as it is poured into the mold will impinge upon said inserts, thus, consequently, placing upon these elements the maximum use, wear and abuse.

While gray iron affords a comparatively inexpensive iloor for the stool, it is, as is well known in the art, exceedingly brittle-and will not withstand hard shocks and jars to which an ingot stool is subjected in a steel mill. It is for this reason that the cast iron oor is reinforced with a frame of steela metal much harder and better adapted to withstand hard usage and abuse.

Moreover, while I have herein described the iloor as consisting of gray iron,v it will be understood that other metals, as copper, having a tendency to discourage, the adherence of steel thereto maybe substituted therefor. However, cast iron is preferred because it is one of the most inexpensive metals adapted for vthe particular purpose. Y l

Although I have illustrated and described a. preferred embodiment of the invention, it will be apparent that various vchanges and alterations might be made in the general form and arrangement of parts described without departing from the invention.l Hence, it is not intended to be limited tothe precise details set forth, and I shall consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

What is claimed is:

1. .An ingot stool consisting of a cast gray iron ingot supporting floor having its perimeter encase within and reinforced by a base of steel, a depression formed in an area of said floor, and a removable section received by said depression occupying substantially the same plane as that occupied by the ingot supporting floor.

2. An ingot stool consisting of a metal supporting floor having its perimeter encased with- 'in and reinforced by a metal base, a depression formed in an area of said floor, and a plurality of interfitting shoe elements receivable in said depression, one of said shoe elements serving as a key wedge to maintain said shoe elements in interntting relation.

3. An ingot stool consisting of a steel reinforcing frame adapted to receive therein a quantity of cast iron in its molten state which, when solidified, is designed to serve as an ingot supporting iloor, Ia recess formed in an area of said iloorJ-and a removable section adapted to be received within said recess.

4. An ingot stool consisting of a steel reinforcing frame adapted to receive therein a quantity of cast iron in its molten state which, when solidified, is designed to serve as an ingot sup- .porting floor, integral lugs formed on said frame iron in its molten state which when poured intoA the frame and solidified has interlocking engagement with the frame, said floor having a recess formed in an area thereof, and a plurality of iitting relation.

HOWARD FELSING. 

